[Mojo Video Capture] Replace RESOURCE_UTILIZATION with interface ReceiverLoadObserver

media/capture/video/video_capture_buffer_tracker.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_BUFFER_TRACKER_H_
 #define MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_BUFFER_TRACKER_H_
 
 #include <memory>
 
 #include "base/synchronization/lock.h"
 #include "media/capture/video/video_capture_buffer_handle.h"
 #include "media/capture/video_capture_types.h"
 #include "mojo/public/cpp/system/buffer.h"
 
 namespace media {
 
 // Keeps track of the state of a given mappable resource. Each
 // VideoCaptureBufferTracker carries indication of pixel format and storage
 // type. This is a base class for implementations using different kinds of
 // storage.
 class CAPTURE_EXPORT VideoCaptureBufferTracker {
  public:
   VideoCaptureBufferTracker()
       : max_pixel_count_(0),
         held_by_producer_(false),
-        consumer_hold_count_(0) {}
+        consumer_hold_count_(0),
+        frame_feedback_id_(0) {}
   virtual bool Init(const gfx::Size& dimensions,
                     media::VideoPixelFormat format,
                     media::VideoPixelStorage storage_type,
                     base::Lock* lock) = 0;
   virtual ~VideoCaptureBufferTracker(){};
 
   const gfx::Size& dimensions() const { return dimensions_; }
   void set_dimensions(const gfx::Size& dim) { dimensions_ = dim; }
   size_t max_pixel_count() const { return max_pixel_count_; }
   void set_max_pixel_count(size_t count) { max_pixel_count_ = count; }
   media::VideoPixelFormat pixel_format() const { return pixel_format_; }
   void set_pixel_format(media::VideoPixelFormat format) {
     pixel_format_ = format;
   }
   media::VideoPixelStorage storage_type() const { return storage_type_; }
   void set_storage_type(media::VideoPixelStorage storage_type) {
     storage_type_ = storage_type;
   }
   bool held_by_producer() const { return held_by_producer_; }
   void set_held_by_producer(bool value) { held_by_producer_ = value; }
   int consumer_hold_count() const { return consumer_hold_count_; }
   void set_consumer_hold_count(int value) { consumer_hold_count_ = value; }
+  void set_frame_feedback_id(int value) { frame_feedback_id_ = value; }
+  int frame_feedback_id() { return frame_feedback_id_; }
 
   // Returns a scoped handle to the underlying storage.
   virtual std::unique_ptr<VideoCaptureBufferHandle> GetBufferHandle() = 0;
 
   virtual mojo::ScopedSharedBufferHandle GetHandleForTransit() = 0;
 
  private:
   // |dimensions_| may change as a VideoCaptureBufferTracker is re-used, but
   // |max_pixel_count_|, |pixel_format_|, and |storage_type_| are set once for
   // the lifetime of a VideoCaptureBufferTracker.
   gfx::Size dimensions_;
   size_t max_pixel_count_;
   media::VideoPixelFormat pixel_format_;
   media::VideoPixelStorage storage_type_;
 
   // Indicates whether this VideoCaptureBufferTracker is currently referenced by
   // the producer.
   bool held_by_producer_;
 
   // Number of consumer processes which hold this VideoCaptureBufferTracker.
   int consumer_hold_count_;
+
+  int frame_feedback_id_;
 };
 
 }  // namespace content
 
 #endif  // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_BUFFER_TRACKER_H_